Uxcell 5.9 x 1.4 x 1 Inch Toilet Bowl Pumice Stones White 4 CountsWhat is this? The pumice stones work well in removing hard water rings and would be great for small cleaning projects. Great for all kitchen and bathroom to clean sink toilet bowl tile and other similar surfaces. What will I get? The pumice stones we provide here are in the size of 150mm x 35mm x 25mm / 5.9 x 1.4 x 1 inch (L*W*H) In the package of 4 x Pumice Stones Are there any advantages of the product? The stones are made of pumice dissolve quickly and wear away as you use them will not scratch the surface. The shape of the stone will fit nicely in your hand and fit into crevices and curved surfaces. How to use it? 1. Wet the pumice stone for 10 seconds test in a small area and always keep it wet; 2. Wipe the dirt slightly with light pressure and several passes on the surface. What should I notice? It is recommended to wear a glove when using it. After cleaning with the pumice you will need to rinse the surface you cleaned.